"High-capacity wireless and optical links employing digital coherent detection"

Dr. Darko Zibar, Associate Professor at DTU Fotonik, Technical University of Denmark

February 4th (Monday), 10:30am
Engineering Science Building (ESB), Rm 2001

Wireless systems are moving towards RF carrier frequencies approaching 100 GHz in order to enable multi-gigabit capacities. For such high RF carrier frequencies electronic processing becomes very cumbersome, since it would require multiple stages of electrical amplification, downconverison and filtering, which may set severe limitation on systems performance and complexity. Therefore, we believe that there is great potential for photonic sampling and photonic processing techniques to solve the upcoming challenges for 100 GHz wireless systems. We show that the proper combination of optical/photonic processing techniques and digital signal processing, low-complexity multi-gigabit wireless signal demodulation for RF carrier frequencies approaching 100 GHz is demonstrated. We show some of our recent experimental results for hybrid optical-wireless links operating up to 100 Gb/s and employing advanced optical modulation formats. Additionally, we will show how intelligent signal processing can help mitigate and monitor linear and nonlinear optical fibre channel impairments for future optical communication systems approaching 400 Gb/s.

About Dr. Darko Zibar:

photo of darko zibar Darko Zibar was born in Belgrade, ex-Yugoslavia, on December 9, 1978. He received the M.Sc. degree in telecommunication and Ph.D. degree in optical communications from the Technical University of Denmark, Lyngby, Denmark, in 2004 and 2007, respectively. He was a Visiting Researcher with Optoelectronic Research Group, University of California, Santa Barbara, January 2006 to August 2006, and in January 2008 where he worked on coherent receivers for phase-modulated analog optical links. From February 2009 to July 2009, he was a Visiting Researcher with Nokia-Siemens Networks where he worked on 112 Gb/s polarization multiplexed systems.

He is currently Associate Professor at DTU Fotonik, Technical University of Denmark. His research interests include coherent optical communication, with the emphasis on digital demodulation and compensation techniques. Darko Zibar is the recipient of the Best Student Paper Award at the IEEE Microwave Photonics Conference 2006, the Villum Kann Rasmussen Postdoctoral Research Grant in 2007 and Villum Foundation Young Investigator Program in 2012.

Hosted by: Professor John Bowers, Electrical and Computer Engineering